Eisen no Lovelock

In an age of chaos, the sudden emergence of superheroes restored peace to the world. Inspired by these so-called saviors of Earth, two brothers made a childhood vow to become heroes together. Yet society divides people into rigid roles: the "Heroes," who protect the masses, and the "Mobs," who are left to clean up the aftermath. The younger brother, Hiiro, is assigned as a Mob, while his older brother, Ao, rises as a Hero. Despite his lowly status, Hiiro never hesitates to throw himself into peril—especially when their childhood friend Iruka is caught in the line of fire.